BlissLights timer is to be utilized with BlissLights Spright . Your Spright will turn on automatically at the same time every night. The BlissLights Timer is a 6-18 timer. Meaning, it will set your Spright to stay on for 6 hours, and then automatically shut off for 18 hours. Designed to plug directly into the waterproof Blisslights power supply. Timer is activated when plugged in for 8 hours on and 16 off so it comes on every 24 hours from the moment you plug it in. Change timing by plugging in at a different time of the day.